Selective reductive coupling of nitro aliphatic compounds with aldehydes in hydrogen using gold catalyst
作者:Larisha Cisneros、Pedro Serna、Avelino Corma
DOI:10.1016/s1872-2067(16)62493-2
日期:2016.10
Nitrones were synthesized in good yields directly from nitro aliphatic compounds, aldehydes, and H 2 using highly dispersed gold nanoparticles on titania. The high selectivity for nitrone synthesis contrasts with the platinum supported on carbon and corresponds to an increase from roughly 50% to 90%. The catalytic performance is tuned by precise control of the struc-ture of the active sites, the characteristics
使用高度分散的金纳米粒子在二氧化钛上直接从硝基脂肪族化合物、醛和 H 2 合成了高产率的硝酮。硝酮合成的高选择性与碳负载铂形成对比,对应于从大约 50% 增加到 90%。通过精确控制活性位点的结构、载体的特性和反应条件来调节催化性能。
Selective Reductive Coupling of Nitro Compounds with Aldehydes to Nitrones in H<sub>2</sub>Using Carbon-Supported and -Decorated Platinum Nanoparticles
作者:Larisha Cisneros、Pedro Serna、Avelino Corma
DOI:10.1002/anie.201402878
日期:2014.8.25
Nitrones were synthesized in high yields directly from nitro compounds, aldehydes, and H2 usingcarbon‐decorated platinum nanoparticles. The high selectivity for nitrone synthesis contrasts that of common supported metal catalysts and corresponds to an increase from roughly 6 to 97 %. The catalytic performance is tuned by precise control of the structure of the active sites and the characteristics
linear copolymer and a cross-linked organogel. The polymers proved highly efficient as recyclable catalysts in the reductive N-alkylation of arylamines under mild conditions and at exceptionally low catalyst loadings. The modular design presented herein can be readily adapted to other finely tuned triarylboranes, enabling wide applications of ROMP-borane polymers as well-defined supported organocatalysts
Reductive amination of 5-acetoxymethylfurfural over Pt/Al2O3 catalyst in a flow reactor
作者:Alexey L. Nuzhdin、Pavel A. Simonov、Galina A. Bukhtiyarova、Ilia V. Eltsov、Valerii I. Bukhtiyarov
DOI:10.1016/j.mcat.2020.111297
日期:2021.1
and Pt catalysts in the hydrogenation of imine obtained by reaction of AMF with aniline showed that Pt-based catalysts (both Pt/Al2O3 and Pt/C) are highly active and provide high selectivity and stability, while Pd and Au nanoparticles supported on γ-alumina and carbon show low selectivity. A wide range of N-substituted 5-(acetoxymethyl)-2-furfuryl amines was synthesized in good to excellent yields
氨甲基羟甲基呋喃衍生物具有药学活性。在这项工作中,提出了用于合成N-取代的5-(乙酰氧基甲基)-2-糠基胺的两步一锅法,该步骤包括两个连续的反应:5-乙酰氧基甲基糠醛(AMF)与伯胺的缩合以及在流动反应器中用氢在负载的金属催化剂上用氢还原得到的亚胺。AMF与苯胺反应制得的亚胺加氢中Au,Pd和Pt催化剂的性能比较表明,Pt基催化剂(均为Pt / Al 2 O 3)(Pt / C)和Pt / C)具有很高的活性,并具有较高的选择性和稳定性,而负载在γ-氧化铝和碳上的Pd和Au纳米颗粒的选择性较低。使用Pt / Al 2 O 3催化剂和甲醇作为溶剂,以良好至极佳的收率合成了多种N-取代的5-(乙酰氧基甲基)-2-糠胺。
Some Transformations of Tertiary<i>N</i>-Furfurylamides of Aromatic and Heteroaromatic Carboxylic Acids under Acidic Conditions
Acid-catalyzed transformations of tertiary N-furfurylamides of ortho-amino substituted aromatic and heteroaromatic carboxylicacids accompanied by elimination of the furfuryl moiety are investigated.